摘要： 本试验测定了北方冬麦区主推的22个冬小麦品种的根系活力以及根系可溶性糖含量,并测定了各品种的抗旱性,尝试寻找根系活力和根系可溶性糖含量与作物抗旱性之间的关系。试验结果显示:22个供试品种中,抗旱指数较高的品种有长6878、长4378、保麦9号、河农825、中旱110等;灌浆中期旱胁迫条件下的根系可溶性糖含量与作物抗旱性呈负相关,推测抗旱性强的品种在旱胁迫条件下将根部形成的可溶性糖运输至穗部灌浆,弥补由于干旱造成的光合产物量的不足。

关键词: 干旱胁迫, 小麦, 根, 根系活力, 可溶性糖

Abstract: In order to find the relation between root activity, root soluble sugars, and their drought resistance, 22 winter wheat varieties which mainly planted in the north of China were detected.The result displayed Chang 6878, chang 4378, Baomai 9, Henong 825 and Zhonghall 1 10 got a high drought index among the 22 varieties.In filling mediam negative correlation was discovered between root soluble sugars and drought index.So we speculated that drought resistance varieties under drought stress can synthesis the root soluble sugar then transport them to ear filling, for the purpose of replenish the drought caused by insufficient amount of photosynthetic products.

Key words: Drought stress, Wheat, Root, Root acitivity, Soluble carbohydrate

中图分类号: 

• S512.1